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S. A.y CHASE, OF BOSTON, MASSACHUSETTS.

Letters .Patent 1Y0. 70,411, tlatedrNovcmbcr 5, 1867. I

IMPROVED ELASTIC SASIPELEVATOR.

T0 ALL T0 WHOM THESE PRESENTS SHALL COME:

Be it known that I, S. A. CHASE, of Boston, in the county of Suffolk, and State of Massachusetts, have invented a new and useful Improvement in the Method of Elevating Window-Sashes; and do hereby declare th'c following to he a full, clear, and exact description ofthe same, due reference being had to the accompanying drawings, making part of this specification, and in whichA f Figure 1 is a Vvertical central and` longitudinal section, and

Figure 2 a vertical central andtransverseseetion of a. window-frame and sashes provided with my invention.

- Figure 3 is an edge elevation of one of such sashes.

The object of this Kinvention is to provide a simple eeonomicaldeviee for elevating window-sashcs, and one which may be readily applied to old houses nnprovided with any means to accomplish this end, and which have no recesses in the window-frame to receive the-ordinary cords and weights employed in modern houses.

-The invention consists in combining with the window-frame and sash or sashes two or more elastic cords, one end of which is fixed to aconvenient part of such frame, and the other to the sash, in such manner that the elasticity of such cord shall elevateI the sash or sashes after being depressed.

In the accompanying drawings, A denotes a window-frame containing two .sashes B C, made and applied together in any well-known or usunlmanner. The outer edges of each sash are grooved or channellcd, as shown at a a, 82e., for reception of an elastic cord, b or e, which is laid within such groove, and confined to the' lower cud of such sash hy any proper device which allows it to be readily removed from eonnectionwith such sash. The opposite ends of such elastic cord lare secured t-othe upper inn'er edge of the window-frame, in juxtaposition with the edge of the sash, and inthe same manner as the cord isseeured to the sash, which consists, in the present instance, of loops d d, formed upon each end of such cord, these loops being passed over screws or studs ef, applied respectively to the edge of the sashfand to the window-frame, as represented in the drawings. The inode of applying the elastic cord, however, may beconsiderably varied without aiecting the character of my invention. Each sash is to be provided with a suitable device for locking it at any desired altitude. Upon releasing or removing the pressure of such lock o'r catch, the lower sash will be raised automatically by the reactive power "of the elasticcord. The upper sash, u'pon being lowered to the desired extent, is to be locked in such position against the reactive power of the elastic cord. Upon releasing the hold or pressure ofthe lock, such sash will be automatically raised te its normal position.

The invention is intended principally for applicationto railway cars, and, as before observed, t-o old houses unprovided with any means o'f raising the sashes, 'although its economy of construction and ease of application and renew'al when worn or destroyed render its employment in any situation valuable. l

The only operation necessary to apply it is to rebate one or both edges of the sash, and to fix the screws or studs in proper position. By means 'of the loopsuponcach end of the elastic cords, these cords may be applied instantly. Should they become worn, or lose their elastic properties, new ones may be substituted by any one with little pains. For railway-car windows or other small windows, a crd upon'one edge may be found suiiicient.

I claim the modeofelcvating window-sashes by means of elastic cords, substantially in manner and for the purpose as described. v

s. A. CHASE. l

Witnesses: y

FREDERICK CURTIS. E. C. GRIFFITH. 

